Embroidering-machine.



No. 697,269. Patented Apr. 8, i902.

D. NADEL.

EMBRIDERING MACHINE.

(Application filed Dec. 30, 1898.)

(No Model.)

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No. 697,269. Patented Apr. 8, |902.

D. NADEL.

EMBROIDERING MACHINE.

(Application filed Dec. 80, 1898.; (Nn ModeLJ- 2 Sheets-Sheet 2.

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EMBROIDERING-NIACHINE.

SPECIFICATION forming part of Letters Patent No. 697,269, dated April 8,1902".

Application filed December 30, 1898. Serial No. 700,748. (No model.)

ject of the Emperor of Germany, residing at Spindlershof 4,Seidelstrasse, Berlin, in the AKingdom of Prussia and Empire of Germany,

have invented certain new and useful Improvements in Crank-Machines forGuiding Fabric when being Embroidered, Stitched, or Similarly Treated,of which the following is a full, clear, and exact description.

The present invention relates to improvements in embroidering-machines;and the object of it is to secure the side movement of the feedpresser-foot in any desired direction, as well as to permit at any timethe alteration of the direction of the feed movement, both thesemovements without the fear of being disturbed by stagnations of thedriving mechanism.

Reference is to be had to the accompanying drawings, in which-Q Figure 1is a front view of that part of the embroidering-machine containing theneedlebar and the feed device with its presser-foot. Fig. 2 is a sideview of the same, partly in section. Fig. 3 is a longitudinal sectionthrough the machine on the line 3 3, Fig. 4, showing the gear for movingthe presser-foot, other parts of the mechanism being omitted. Fig.4isacross-section on the line 4 4, Fig. 3. Fig. 5 is a bottom view ofthe machine. Figs. 6, 7, and S are detail views of parts of the feedmechanism hereinafter described.

1 is the main shaft, driven continuously loy the usual strap or cord. Aworm 2, rigidly fixed on the main shaft 1, rotates a vertical shaft 3 bymeans of a worm-wheel 4. Bevelwheels '5 serve to transmit the slowrotation of the shaft 3 to a drum 6, rigidly securedon a shaft 7,mounted in a bearing 8. In the circumference of the drum 6 are cut camgrooves or paths 9 and 10, which by means of the connecting-rods 12 13transmit movement to a crank having arms 14 15, one of which is rigidlysecured on a shaft 16, Fig. 3, which is mounted in a bracket 17. Bybevel-wheels 18, 19, 20, and 21 the rotation of the shaft 16 will betransmitted to shafts 23 24 25 and finally to a vertical hollowr shaft26, Figs. 1 and 2. The hollow shaft 26 is mounted in the bearings 27 andcarries a socket 28, which by means of a vertically-movable fork 29 anda circular notch or gland 30 may be moved up and down, but is compelledto rotate with the hollow shaft 26 by the spline 3l. The fork 29 isrigidly mounted on a bar 32, sliding in eyes 33 and moved upward by aneccentric 34, Figs. 1 and 2, which is rigidly secured on the main shaftl. In order to transmit the upward movement from the eccentric 34 to thefork-bar 32, the latter is provided with a rigid arm 35. The downwardmovement of the fork-bar 32 is obtained by the spring 36, the lower endof which rests on a projection on the fork-bar 32, while its upper endbears upward against a projection 38 on the immovable front frame 37 ofthe machine. By a set-screw 39 a fork 140, Figs. 1, 6, and 8, is rigidlysecured on the hollow shaft 26, the lower part of which is rectangularin crosssection and supplies a horizontal guide for a disk 40, servingto give the presser-foot 41 the horizontal movement necessary to enablethe machine to embroider designs which consist of uniformly-repeatedregular or irregular lines of straight or curved shape.

The presser-foot 41 is secured on a bar 42, by means of a socket 43 anda set-screw 44 on the bar 42,- and receives a swinging movement by thedisk 40, which is embraced by a ring 45, the fork 46 secured to the bar42. A swivel-joint 66 serves as a suspension-point for the bar 42. Thesocket 28 is provided with an inclined surface 47, which is continuallyin contact with the upper arm of a lever 48 49, pivotally attached tothe fork 46 by means of a pin 50. The lower arm 49 of this lever engagesin a hole 5l of the disk 40. As the main shaft 1 rotates the socket 28is also moved up and down, thereby by its inclined surface 47 causingthe lever 48 49 to move the disk 40 in the direction of the arrow 53.During the upward movement of the socket 28 the disk 40 is pushedbackward against the direction of the arrow 53 by a wire spring 54, 9

rectangular part of the fork 46, the hole 52 of the disk 40 beingsufticiently lengthened IOS to vpermit the horizontal movement of thelatter, 40, already described.

A spring 56L presses the presser-foot downward upon the material to beembroidered. As the slight up-and-down movement of the presser-foot andthe purpose of it, as well as the means by which this movement will beobtained, are well known,these means are not further described. Theseparticular movements and the means to secure them also form no part ofthe present invention. The same is the case with the parts shown inFigs. l, 2, and 6 to S; but as the present invention will not beunderstood without referring to those parts of the machine these latterare fully described. The needle (not shown in the drawings) is securedon the lower end of the rod 60, sliding with high speed lengthwise andup and down in the hollow shaft 26. The mechanism which imparts thismovement to the rod 60 is well known, and therefore it also forms nopart of the present invention.

It will be seen from the foregoing that as the sleeve 28 by the shaft 1,the eccentric 34,

and the slide-bar 32 is moved with the same high speed as the needle-rod60, the lever 48 continuously oscillates on its pin 50, thereby V bymeans of the disk 40 the strap 45, and the rod 42 imparting areciprocating fore-andback motion to the presser-foot`4l. The hollowshaft 26 is continuously turned with low speed, thereby taking with itthe sleeve 28 and thedisk 40, and the direction of the reciprocatingmovement of the presser-foot is continually altered, so that a curvedseam will be obtained. To continually and correspondingly repeat thiscurved seam in such a manner that each time theend point of one curveforms the beginning of the following one, the drum 6 is provided andeach whole revolution corresponds to every such curved seam, as duringthe time necessary for the drum to turn once around the hollow shaft,together with the sleeve 28 and the disk 40, will complete a revolution.

It will be clearly seen that the shape of the curved seam depends uponthe manner in which `the shaft 26 is turned, as well as upon the measureof horizontal movement or push of the presser-foot. If the hollow shaft26 is turning perfectly uniform and the fabric is pushed slowly by thepresser-foot, the curve will have another shape than if the shaft turnsirregularly and the foot 41 pushes the fabric with greater speed.

Whether the hollow shaft is turned regularly or irregularly depends onlyupon the shape of the cam-paths 9 and l0, governing the turning movementof the crank-arms 14 and 15. These crank-arms are theoretically arrangedin an angle of ninety degrees with Yrespect to another; but as the lowerarm 14 is rigidly secured on the crank-pin of the upper 15 this arm 14is actually directed in an -angle of forty-five degrees with respect tothe arm of the upper crank 15, as clearly shown in Fig. 5. Thedisposition of the two cam-paths 9 and 10 of the drum 6, together withthe crank-arms 14 and l5, arranged at an angle to each other, forms thesubstantial object of the present invention.

The crank-arms are, as described, arranged at an angle to each other,and each of the connecting rods 12 and 13 is attached to the outer endof the corresponding arm or attached so that the effective workingIangleis ninety degrees. The cam-paths are complementary-that is to say, theyare so arranged that each path will operate the crank and shaft tocontrol the feed mechanism; but one crank-arm will be at its maximumleverage while the other is at its minimum, so that no dead-centers canoccur, and the work is carried on continuously.

To prevent the pins 64 65 from coming out of gear with the cam-paths 9and 10, the rods 67 68 may be provided and pivotally attached at 69 70.A guide-bar 71 serves for supporting their ends, thereby keeping thepins in contact with the notches.

I claim- 1. An embroidering-machine comprisingin combinationstitch-forming mechanism, feeding mechanism and controlling mechanismtherefor comprising a crank and means for operating the crank comprisinga pattern-drum having complementary cam-paths, and independent elementsoperatively connecting said cam-paths and crank.

2. An embroidering-machine comprising in combination stitch-formingmechanism, feeding mechanism and means for controlling the feedingmechanism comprising a crank, a pattern-drum having complementarycam-paths, elements connecting the crank and the campaths and sodisposed that the leverage of one is at its maximum while the other isat its minimum.

3. An embroidering-machine comprisingin combination stitch-formingmechanism, feeding mechanism and means for controlling the feedingmechanism including a shaft, a crank having arms arranged at an angle toeach other and carried by the shaft, a pattern-drum having complementarycam-paths, and means connecting the cam-paths and crank-armsrespectively for the purpose described.

4. An embroidering-machine comprising in combination stitch-formingmechanism, feeding mechanism, and means for controlling the feedingmechanism comprising a shaft, a crank having two arms arranged at anangle to each other and secured to the shaft, a pattern-drum having twocomplementary campaths, and a pair of rods, each connecting a cam-pathwith the corresponding arm of the crank, the connections being sodisposed that the effective working angle is greater than the actualangle of the arms.

5. An embroidering-machine comprising in IOO combination stitch-formingmechanism, feedmeans for holding the rods in position in the ingmechanism, and means for controlling the cam-paths, substantially asdescribed. xo feeding mechanism, comprising a shaft, a In Witnesswhereof I subscribe my signacrank having arms arranged at an angle toture in presence of two Witnesses.

5 each other and carried by the shaft, a pat- DAVID NADEL.

terndrum having complementary cam-paths, Witnesses: connecting-rods,each attached to an arm of ERWIN L. GOLDSCHMIDT,

the crank and operated by the cam-paths, and WOLDEMAR HAUPT.

